--Go to the closing } of the SigLib table in the screen load script and
--delete it. Then paste all of this code in its place.
--The new closing } for the SigLib table is on line 35 of this script.

-----------------------------------------------------------
--     MPG 3 Axis & 3 Multiplier Select	                 --
-----------------------------------------------------------
-- These simply run the MPG function if their state changes.
-- Change the below Input numbers to suit your Mach4 set-up.

[mc.ISIG_INPUT1] = function (state)
    MPG()
end,

[mc.ISIG_INPUT2] = function (state)
    MPG()
end,

[mc.ISIG_INPUT3] = function (state)
    MPG()
end,

[mc.ISIG_INPUT4] = function (state)
    MPG()
end,

[mc.ISIG_INPUT5] = function (state)
    MPG()
end,

[mc.ISIG_INPUT6] = function (state)
    MPG()
end

}

------------------------------------------------------------------------------------------------
--   MPG function.  ( Remember to change the below input numbers to match the inputs above)  --
------------------------------------------------------------------------------------------------
                                                                   -- For refernece, enter your Ports and Pins below
function MPG()
	local hSig, rc = mc.mcSignalGetHandle(inst, mc.ISIG_INPUT1)    -- Is mapped to Port _ Pin - *X Selection
	local XSelection, rc = mc.mcSignalGetState(hSig)
	local hSig, rc = mc.mcSignalGetHandle(inst, mc.ISIG_INPUT2)    -- Is mapped to Port - Pin - *Y Selection
	local YSelection, rc = mc.mcSignalGetState(hSig)
	local hSig, rc = mc.mcSignalGetHandle(inst, mc.ISIG_INPUT3)    -- Is mapped to Port - Pin - *Z Selection
	local ZSelection, rc = mc.mcSignalGetState(hSig)
	local hSig, rc = mc.mcSignalGetHandle(inst, mc.ISIG_INPUT4)    -- Is mapped to Port - Pin - *.100 Selection
	local Step100, rc = mc.mcSignalGetState(hSig)
	local hSig, rc = mc.mcSignalGetHandle(inst, mc.ISIG_INPUT5)    -- Is mapped to Port - Pin - *.010 Selection
	local Step010, rc = mc.mcSignalGetState(hSig)
	local hSig, rc = mc.mcSignalGetHandle(inst, mc.ISIG_INPUT6)    -- Is mapped to Port - Pin - *.001 Selection
	local Step001, rc = mc.mcSignalGetState(hSig)
	
	if XSelection == 1 then
		mc.mcMpgSetAxis(inst, 0, 0) --X Axis
		mc.mcCntlSetLastError(inst, "X Selected")
	elseif YSelection == 1 then
		mc.mcMpgSetAxis(inst, 0, 1) --Y Axis
		mc.mcCntlSetLastError(inst, "Y Selected")
	elseif ZSelection == 1 then
		mc.mcMpgSetAxis(inst, 0, 2) --Z Axis
		mc.mcCntlSetLastError(inst, "Z Selected")
	else
		mc.mcMpgSetAxis(inst, 0, -1) --No Axis
		mc.mcCntlSetLastError(inst, "No Axis Selected")
	end
	
	if Step100 == 1 then
		mc.mcMpgSetInc(inst, 0, .100)
	elseif Step010 == 1 then
		mc.mcMpgSetInc(inst, 0, .010)
	elseif Step001 == 1 then
		mc.mcMpgSetInc(inst, 0, .001)
	end
end